Anpr
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Transcript of Anpr
AUTOMATIC NUMBER PLATE RECOGNITION SYSTEM
INTRODUCTIONVehicle Registration Plates
A vehicle registration plate is a metal or a plastic plate attached to a motor vehicle for official identification purposes.
The license plates are placed on the front and back of the vehicle.
Automatic Number Plate Recognition System(ANPR)
ANPR is an image –processing technology which is used to identify vehicles by their number plates using Optical Character Recognition.
This technology is used in various security and traffic applications such as access-control system.
ANPR(contd…)
Various names of this technology are:
License Plate Recognition
Car Registration System
Intelligent Transport System
Access-control While the vehicle approaches the gate ,the
ANPR unit automatically reads the license plate registration number, compares to a predefined list and opens the gate if there is a match.
ANPR EQUIPMENTANPR equipment incorporates all the
hardware and the software necessary to capture the images of the vehicles and to recognize the number plates.
ANPR system consists of:ANPR hardwareANPR software
ANPR HARDWARE
It comprises of:
Camera system
Computer
Frame Grabber
Trigger
Camera SystemThe camera system takes a snapshot of the
trespassing vehicle.
It uses an IR light spectrum and illuminator which produces an illumination.
The illumination used is Infra-Red(IR) because it is invisible to the driver.
Below we can see the picture of a car with headlamps on; on the left there is a picture of a car taken by an ordinary camera whereas on the right there is the same car photographed using IR filter and IR illuminator.
ComputerThe computer is normally a PC running
Windows.
It runs the ANPR applications which
Controls the system
Reads the images
Analyzes and identifies the plate and
Interfaces with other applications and systems.
Frame GrabberFrame Grabber is an interface between the
camera and the PCIt is a computer module that provides
digitalization of pictures in case analog camera is used.
Most commonly used frame grabber is FXVD4
Trigger
Trigger is used by ANPR systems to know that
vehicle
came to the control spot so that the camera can
be
triggered.
ANPR SOFTWARE
When a vehicle approaches the camera, the ANPR software takes a series of snapshots and stores them in a file.
When the number plate is of sufficient size, it is scanned, the registration number is converted into ASCII code and held in a list.
ANPR SOFTWARE(contd…)
This process continues for a series of images depending upon the speed and the position of the vehicle.
Upon the completion of the process , an accurate result is selected from the stored list.
WORKINGThe ANPR process is divided into three steps:
Detection of vehicle
Capture of images
Process of recognition
The next few slides show how a typical
access-control system works
Detection Of VehiclesThe vehicle approaches the secured area and
the process starts when the vehicle steps over a magnetic loop detector.
The loop detector senses the car and it’s presence is signaled to the ANPR unit.
Capture of ImagesThe ANPR unit activates the illumination and
takes pictures of the front and rear plates using ANPR camera.
The images of the vehicle is read by the ANPR unit’s image processing hardware or the frame grabber.
Process of RecognitionThe ANPR unit analyzes the image with
different image processing software.The ANPR unit checks if the vehicle appears
on a predefined list of authorized cars and if found it signals to open the gate by activating it’s relay.
Process of Recognition(contd…)The authorized vehicle enters the secured
area and after passing the gate it’s detector closes the gate.
The system waits for the next vehicle to approach the secured area.
ANPR Unit
CONTROL SYSTEMSTraffic Control
Traffic control systems use ANPR units which provide details about the movement and flow of vehicles around the road network.
These details can highlight the problem areas and help to make incident management decisions.
Electronic Toll Collection
ANPR can be used for electronic toll
collection on smart highways and roads. This
process does not require cars to stop at the
toll booth but instead uses Radio Frequency
Identification to deduct toll charges.
Electronic Toll Collection(contd…)
One smart road in operation is the E-Z pass in
New York. In this system a computer reads an
electronic tag mounted inside the car’s
windshield and automatically deducts the toll
from a pre-established account.
ADVANTAGES
ANPR systems make use of registration
plates that all cars already have, so there is
no need to add transmitters or special signs
to vehicles which results in saving towards
the implementation of the system.
ADVANTAGES(contd…)
The photograph of the car and the driver can
be stored and retrieved if there is a need for
evidence in disputes or crime situations.
APPLICATIONSThe various applications are:
Parking
Access-control
Tolling
Border control
ParkingThe plate number is used to automatically
enter pre-paid members and calculate parking fee for non-members (by comparing the exit and entry times).
Access-ControlA gate automatically opens for authorized
members in asecured area, thus replacing or assisting the
securityguard. The events are logged on a database
and could beused to search the history of events.
TollingThe car number is used to calculate the travel
fee in a
toll-road, or used to double-check the ticket.
Border ControlThis installation covers the borders of the
entire Country.
Each vehicle is registered into a central
database and linked to additional information
such as the passport data. This is used to
track all border crossings.
Security Features On Registration Plates
Electronic vehicle identification
A potential to provide an accurate vehicle
record
Means for Personal identification to be
checked in the system
Security Features On Registration Plates(contd…)
Minimize evasion of Tax and Insurance.
Unambiguously links a car with a person.
CONCLUSIONThere is an immediate need of such kind of
Automatic Number Plate Recognition system in India as there are problems of traffic, stealing cars etc.
Government should take some interest in developing this system as this system is very economical and eco-friendly, if applied effectively .
CONCLUSION(CONTD.)
It is still not being used in our country but will be prove to be effective.
This change will help in the progress of the nation.
THANK YOU